Effect of temperature on electronucleation and growth mechanism of Zn–Ni alloy in deep eutectic solvent
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 24 August 2023
Issue publication date: 20 November 2023
Abstract
Purpose
The purpose of this paper is to study the effect of temperature on Zn–Ni alloys in ChCl–Urea.
Design/methodology/approach
Based on cyclic voltammetry experiments, the deposition behavior and kinetics of the Zn–Ni alloy are studied. The nucleation process of the Zn–Ni alloy is studied in detail via chronoamperometry experiments. The effects of the deposition temperature on the microstructure, Ni content and phase composition of Zn–Ni alloy coatings are investigated via scanning electron microscopy and X-ray diffraction (XRD) combined with classical thermodynamics.
Findings
The results show that with increasing temperature, the reduction peak shifts toward a more positive electric potential, which is beneficial for the co-electric deposition process, and the diffusion coefficient is estimated. With increasing temperature, the nucleation process of the Zn–Ni alloy becomes a three-dimensional instantaneous nucleation, the typical kinetic parameters are determined using the standard 3D growth proliferation control model and the Gibbs free energy is estimated. The Zn–Ni alloy coatings are prepared via normal co-deposition. With increasing temperature, the degree of crystallinity increases, the coating gradually becomes uniform and compact and the XRD peak intensity increases.
Originality/value
The nucleation process of the Zn–Ni alloy at different temperatures is analyzed. The diffusion coefficient D and Gibbs free energy are calculated. The contribution of the three processes at different temperatures is analyzed. The effect of temperature on the morphology of the Zn–Ni alloy coatings is studied.
Keywords
Acknowledgements
This work was supported by general project of basic scientific research in colleges and universities of Liaoning Provincial Department of Education [project LJKMZ20220598]; High Level Achievement Construction Project of Shenyang LiGong University [project SYLUXM202105]; Research Innovation Team Support Project of Shenyang LiGong University [project SYLUTD202004].
Citation
Sun, H., Cui, J., Wang, H., Yang, S., Xaikoua, S., Tan, Y., Zhou, X., Wang, B. and Sun, J. (2023), "Effect of temperature on electronucleation and growth mechanism of Zn–Ni alloy in deep eutectic solvent", Anti-Corrosion Methods and Materials, Vol. 70 No. 6, pp. 418-427. https://doi.org/10.1108/ACMM-05-2023-2806
Publisher
:Emerald Publishing Limited
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